Sand-blast nozzle.



No. 839,483. PATENTED DEC. 25, 1906.

W. KELLY. SAND BLAST NOZZLE.

APPLICATION FILED DEU.2 3.19D5.

ll. KELLY, )5

WILLiAi" PORN A Specification. Oi

Letters Patent. Patez'ited Dec. .25, 1906.

Agphcatlou filled December 23,1905, Burial No. 295,413,

To (all lull/om if may, HHIJHi-i'ii' Be it known that ll": Y in! citizen of the United l t Francisco, in tho mm and State oi el win new and a l improvements in Blast Nozzles, of which the follows: specificationv My invention relates to sand blast apporetus, end more part cularly to the nozzle 01' )ortionv through which the material is delivered for effecting the desired object.

in using a combined stream or current oi ail-e bredingnmteriahas sand, and a pro medium, are air under pressure, it vex y inipoi'tant that the sand be delivn rod in us own and constant a strewn as possible and LHHli-in uniform pressure wow, I wl n ibis l.l(:l l t very them. positively, \S'illill can be done in any desired. manner. lw'hcro rhesnnd is moist, ithzzs been found rerydiillcult, nod h some instances impossible, to use it without drying before trying to pass it tlu-ougb the ll. si (l apparatus, owing to the liability of the de livery-orifice becoming partly or entirely clogged up. 7

Que of the objects of my invention is to produce anozzle which will be very r ompnct but easily so led and which will lmve great cillciency with the loo 1. possible of the parts which are ex l :o tho shred ing act-ion of the s l Another ob" nozzles throw to slorl from t thereby pen. sized tip in e. avoidi g the no. difi'erent-sized pert th san same purpose.

All CillljOtllIllFlU of tho lUYKJlllOU is shown mtheocooinpuoyi inw i l Figure lv a sit gitudmcl sect m i i show.

ings, 1 indicates the bod or main portion of the nozzle, which hollow and substantially boot-shaped. with the foot portion substnntielly cylindrical in cross-section and a pas- .sege crop-clung 2 through the toe portion V The hollow oi the leg portion 4 terminates at "its inner id in it cavity or chamber 5, which lll, have invented ar-- {forms :1 'rr ervol for the compressed air, I which (2121 our: gh an opening or o lliC h p re cots a ll ill lll' hollow plutlc or 11 iple A re in; or sl t5, proforiilil'y tapering or (Mnittill upon its ext rior and interior, is se cured at rho bottom of the boot, by means of 1: clump or hand-like coupling or ferrule 9, which has one end tapering to engage with the lurgor end of the casing and the othtr end screw-threaded to engage with Lho'sc1'e\' tlil'GLl'ilS m on the body 1. and lheroby draw the end of ihe rns 1;; closely against the hottom of the boot, and o: in making an airligln joint n1if )l\1](ull4I-ll.

'lho smnllor end o; rh nosing ls closed ox- (cpl lo! ul; axial born or opening 1. l, which is protomlih sligluly tapering mud stands directly in omnonl with the nipple 7 and in which :1 ti, )2 is remm'ul l seated. The tip 12 is preferably slightly tapering, so as to lit the opening 11, with its smaller end preferably extending t short distance beyond the end of the o 11g mid its larger end standing at a slight distance in front of the forward end of the nipple 7.

The opening 2 is preferably of two dizunetors and stands at an angle to the lcs and to the axis of the nipple 7 The inner end of tho eporing is mooring rind of the some in- 11mm 21 the opening ll, and the TOW-tlliGifllGLl for-the reception of hollow conntctor iii, the intermediate portion of the connector being shouldered, as "ms oi' surcwin it into po lieznowl; seated lit the inner or ;;"Lio1a o: the opening 2 is a tip 15, the error countcrpiirl, of the tip 12, be i" rrlmzigcol le therewith, and tip itsomller end projects a slight cure beyond the end of the opening, so that is 11m be given a sllgh l biow to unseat it case it, should have :1 modem- 3 to stick in The larger end ol the lip 15 is l :o W cog; d b r rho inner end of elor l3 and he thereby pipe or com. held my its seat when thoperts are asl l l I When using my invention above do- 1 scribed, 11: is connected with the iree ends of l two hose f iblc tubes 16 and 1'7, which ere comic any suitable source of supply, double-compurtment tank or re- 'ceptacle 18, one of which compartments is provided with seed and the other with compressed .air, the latter compartment being also preferably connected with the sand 5 chamber through a valved pipe 19.

The air enters the device through the leg 4 and is discharged from the tip 12 in a small stream or jet with considerable force, depend-.

ing upon its flow through the pipe 16 end the pressure in the tank 18. The inner end of the bore throiwh the ti 12 is 'lsr erthen the bore throu h the In )l6 1 end rererahl slightly flaring, so that as the err passes of the no the heroes the short space from the end I nipple into the bore of the t ait deslred quantity of sand which he. charged from the tank into the cesingt though the pipe 17 and connector 13 and drives it out of the tip 12 egainst the object losing the eirizegsive" back pressure 'wlneh occursis permitted't-o' enter a chamber or cavity as it-passes from its outlet to the he e of the die- 0 charge-tip, and it also renders "do use dsrnp or moist sand ithout dz clogging or stopping up the'nozzle v so reduoes'th-e wear or MUD upon the nozzle to a minim irn. 5 I 3 5 The formation of-the ctdi ycrreservoir at the rear of the discharge-outlet and at one side offthe main psssege, vithi-ts entrance or throat 20 contracted enditsrear'wsll overhanging or directly tot-he rear ft'he orifice 6, 0 also adds'to theefiiciencyofthe apparatus by providing'a cushion ofsir, Which'sots as an automatic iiegu etor, es it were, which will have a tendency to qorevent haokilow of the sir in case the passage should temporarily .5 become obstructed from any cause, as the using Wet or moist send.

By constructing the apparatus so that the same tip can be used interchen ehly for deli rering the sand to or from the interior e very desirable structure is secured, and as those two pieces are suhstentislly the only ones that are subject to Wear and require to be replaced it renders it easier to repair, as there is no possibility of getting the Wrong tip in the wrong place and there is not the re quirement of carrying so many di1lerentsized pieces in stock.

For taking the structure to pieces or putting the psrts together the coupling 9 is 6o roughened or knurled upon its exterior, as shown-at 21, by which it can be firmly grasped, and the connector 18 can be readily removed by an ordinary wrench.

ing-therewilth ncozste its e and passage hsvi removable 4 y 1 v A 7 I i or he tn passages b8111 mterche 1% opening, int-ere here, hollow,

larger end of the casing and i the mi. r :nuln

k N to said essar 2. A sano-Llest ale herring e p. 1 v for the propelling fl with s removeh 7), ends passage for the shreding materiel, 5- id second passage hei'ng disposed at an a "le the axis of the .I 1 passage en connr 3. In ssnd-hlsst nozzle, st'antially lTOG'Q-SilitB-Ed body he? ciined opening through the of the opening end scrwv-threeiile cured Y end of-tthioh i said openings, see

the outer end said incline curing said tip in the ii-iner end and es 111% sand thereto, and a nipple .ie the hollow or" t-he'borfiy he oi" the front tip and hardly e than the 1. in a, send-blast stsn inlly hoot-shepeo which is toe is provided v.1

1 en incl 1e.

tapering e sniping-bond en threzuled portion of thethody, iri rem-n2 r15 tips in said openings, {L nip, hoilow of t; e hotly to rear. the forward ti r it connector ir elined-openin to he t" the t' in testimony whereof 1. viii 2r 1 so in presence 'o'l -two witnesses, 114.1153 it). December, 15-3 95. 

